- Preoperative support Preoperative prescription of antibiotics will be systematic when the patient will be included in the study. The preoperative antibiotic association include: amoxicillin-clavulanate (Augmentin ® 2gx3/jour or generic with dosage equivalent). In case of allergy to beta-lactam antibiotics, the patient will be excluded from the study. Patients will be included in the study, either before hospitalization (through the use of emergency shelter), either when the patient will be hospitalized in a department (gastroenterology, geriatrics, internal medicine, etc..). A proportion of patients will have already started antibiotics (prescribed by the physician, or by the department where the patient is hospitalized). The history of antibiotics received by patients will be collected in case report forms and analyzed. For these patients, after inclusion in the study and prior cholecystectomy, antibiotic being arrested and will be replaced by amoxicillin - clavulanic acid at a dose of 2gx3/jour, in the absence of beta-lactam antibiotics allergies . The total duration of preoperative antibiotic will depend on the time of surgery and should last, in all cases, less than 5 days (inclusion criteria). The total duration of antibiotic therapy by amoxicillin - clavulanate is analyzed.